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TitleSpace-time relations between mineralization and magmatism: Argentinian Andes (27°-28°S)
AuthorRubiolo, D G; Hickson, C
SourceProceedings of the 24th New Zealand Geothermal Workshop 2002; by Soengkono, S (ed.); Browne, P R L (ed.); 2002 p. 73-78
Alt SeriesGeological Survey of Canada, Contribution Series 2002136
PublisherGeothermal Institute, The University of Auckland & The Centre for Continuing Education (Auckland, New Zealand)
Meeting24th New Zealand Geothermal Workshop; Auckalnd; NZ; 2002
Lat/Long WENS -69.0000 -67.5000 -27.0000 -28.0000
Subjectsgeochemistry; geochronology; igneous and metamorphic petrology; metallic minerals; structural geology; tectonics; field work; igneous petrology; volcanic studies; volcanism; precious metals; epithermal deposits; crustal thickness; porphyries; downgoing slab; subduction zones; tectonic evolution; hydrothermal deposits; gold; silver; Pliocene; Oligocene; Miocene; lavas; volcanic arcs; Cenozoic; Quaternary
Illustrationslocation maps; geological sketch maps; graphs
AbstractNew regional geological compilation and field work, including petrological and geochronological data, facilitated the reconstruction of the volcanic history of the southern end of Central Volcanic Zone in Argentina (between 27-28 S) Cenozoic arc migration and broadening extended volcanism over several geological provinces such as Cordillera Frontal, Precordillera, Famatina and Pampean Ranges. Four major volcanic events built different volcanic arcs in this Andean segment: 1) a Paleogene magmatic arc, 2) an Oligocene-Early Miocene volcanic arc (the Maricunga Belt), 3) a Late Miocene volcanic arc which migrated and broadened to the east, and 4) a Pliocene-Quaternaryvolcanic arc that is today represented by fumarolic activity on Nevado's Ojos del Salado volcano. The volcanism developed above a thickened crust and was accompanied by the emplacement of important copper-bearing porphyries and development of epithermal precious metal deposits.